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Topic Review (Newest First)

08-06-2010 09:20 AM

454C10

460 to a 496 is worth about 8% more power. (if the heads are up to it)

in general a 460 cid bbc with 450hp/500 ftlbs will go to 486/540ftlbs with a 496.

08-05-2010 10:57 PM

ribmaster

Quote:

Originally Posted by ericnova72

You haven't given much to go on as far as rpm range you expect, or how you intend to use the engine. Need more info on the vehicle.

http://www.google.com/gwt/x/i?wsc=yq...p=012a457a658e. This is the cam size I chose originally before I decided to stroke it. Got some good infor from tech on here .just wondering now that the stroker will give me more bottom end torque if I should go up on cam size for more midrange and top end? Thanks for any suggestions would I need a little more duration than what this cam offers?

08-05-2010 05:19 PM

ribmaster

only cost me 572 dollars more to get the rings so i figure why not. now im worried bout the cam again

08-05-2010 05:16 PM

ribmaster

i double checked and the pistons r a .60 overbore vs the 30. i would rather have a fresh bore and the machine shop said it would be close with all the test he done on the rings and such i dont know what all they do. i just know i would rather have new pistons and rings than something thats allready got wear on it.

I realize the usual amount to be honed is much less than that, and also I'm thinking the hone wouldn't be capable of removing taper that might be present in a worn cylinder, but then I'm not a machinist.

Doable or not advisable, or?

What is the smallest practical amount that can be bored?

08-05-2010 02:35 AM

ericnova72

At .030" overbore it makes a 489 with the 4.25" stroker crank. If bore is fine at .030 then use it, no sense boring more than you have to.

08-05-2010 12:44 AM

techinspector1

Quote:

Originally Posted by ribmaster

Do u happen to know the bore on the 496 stroker I'm allready 30 over . I might not be able to do a 496

+0.060" with a 4.250" crank makes a 496.
I haven't yet seen a BBC that wouldn't take a +0.100" bore. (4.350" bore with a 4.250" crank makes a 505.)

08-05-2010 12:28 AM

ribmaster

Do u happen to know the bore on the 496 stroker I'm allready 30 over . I might not be able to do a 496

08-05-2010 12:02 AM

ericnova72

Quote:

Originally Posted by ribmaster

Street and strip kinda like a fish and ski boat lol that's why I wanna keep the cp down. The cam range is from 2800 to 6800 .just wondered if the stroker would give it more low end torque since my intake runners are big and ill lose some bottom end

Yes, the stroker will give more low end torque. In the end it is all a cubic inches game, an overbore doesn't add many cubes so it doesn't add much hp. A stroker crank adds many more cubes, so it adds more power.

Cam doesn't sound like a bad choice, rpm range will be a little lower due to increased cubes, like 2500-6500 rpm.

08-04-2010 11:37 PM

ribmaster

Street and strip kinda like a fish and ski boat lol that's why I wanna keep the cp down. The cam range is from 2800 to 6800 .just wondered if the stroker would give it more low end torque since my intake runners are big and ill lose some bottom end

08-04-2010 11:32 PM

ericnova72

Quote:

Originally Posted by ribmaster

Will cam selection change any? can I keep the 243 249 630 full rollar

You haven't given much to go on as far as rpm range you expect, or how you intend to use the engine. Need more info on the vehicle.

08-04-2010 11:28 PM

ribmaster

Will cam selection change any? can I keep the 243 249 630 full rollar

08-04-2010 11:21 PM

ericnova72

Being a stroker doesn't change the octane requirements as long as the comp ratio is kept the same, at 10.5-ish and aluminum heads with a good chamber shape the AFR heads have it should be fine. The added cubes of the stroker is what makes the additional power. Cubic inches are always king, most serious BBC racers are using 540 or bigger, with up to 632 being pretty common now days for that very reason.

08-04-2010 11:07 PM

ribmaster

Useing afr 325 cc intake runners 115 cc chambers..will the cp being what it is matter with it being a stroker I can still run pump gass and have nore hp just making it a stroker vs just an over bore?

08-04-2010 11:02 PM

ericnova72

Overly simple answer is yes, all things being equal, 36 more cubes should almost automatically get you at least 36hp, and more like 45-60hp if this is a performance build. Just make sure you have heads big enough to feed it, 90% of stock heads are not going to be big enough. Large Oval ports will need a lot of port work and bigger valves, or use Rectangular port heads on an engine this big. GM uses Rectangle ports on the hottter 502's that they offer.

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